<p>Colin Firth also returns as Mark Darcy and,&nbsp;although they were engaged, things don&#39;t seem to have turned out well.</p>

<p>Patrick Dempsey stars as a new love interest and Bridget does not know which of them is father to her unborn child.</p>

<p><iframe allowfullscreen="" frameborder="0" height="315" src="https://www.youtube.com/embed/zd6onP_HxDY" width="560"></iframe></p>
